Well my pond has all sorts of rock I assume the fry hide in until they are large enough the goldfish can't eat them. Offering the extras would require a place to house them until they could be advertised and picked up. Then I would have to meet w crazy people I don't know, and answer a lot of phone calls ect. It would be time consuming and it would be every year. I also do not want the fish going from huge pond to tiny fish bowl, so I feel it is best for all involved to euthanize them in a quick manor.
